21415525311 has 16 divisors (see below), whose sum is σ = 30454376544. Its totient is φ = 13339106304.

The previous prime is 21415525289. The next prime is 21415525319. The reversal of 21415525311 is 11352551412.

It is not a de Polignac number, because 21415525311 - 2¹⁴ = 21415508927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21415525319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525540 + ... + 1539513.

It is an arithmetic number, because the mean of its divisors is an integer number (1903398534).

Almost surely, 2^21415525311 is an apocalyptic number.

21415525311 is a deficient number, since it is larger than the sum of its proper divisors (9038851233).

21415525311 is a wasteful number, since it uses less digits than its factorization.

21415525311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3065210.

The product of its digits is 6000, while the sum is 30.

The spelling of 21415525311 in words is "twenty-one billion, four hundred fifteen million, five hundred twenty-five thousand, three hundred eleven".